Shimano Ultegra CS-R8100 Cassette, Speed: 12, 11-34T, ICSR810012134

The uninterrupted shifting experience of the ULTEGRA R8100 12-speed cassette range lets you climb, sprint, and push your limits without stopping to think about your next gear change, thanks to the larger driving cogs maximizing drivetrain range and efficiency.

• HYPERGLIDE+ Technology
• Faster, seamless shifts under maximum pedaling load
• Refined 12 step gear combination provides peak efficiency and accelerating performance for every situation
• Available in 11-30 or 11-34
• Compatible with road 11-speed FREEHUB body
• Recommended chain: CN-M8100